Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8e787a5350517a…

MALICIOUS

PDF

81.6 KB Created: 2020-12-28 09:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 93ebb134bd2d51a279d4c9cf66fe8cc2 SHA-1: 915c7f675a4874933e07c2720acfb23d5b4eeaba SHA-256: 5f8e787a5350517aaa15a8ad25d537ea5b4a19a38000af64c062dfefa2fcd9ee
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffking.ru', which is likely used to host phishing content or deliver a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to 'cellular organelles and functions'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/aws?utm_term=organelos+celulares+y+funciones+pdf PDF link annotation
    • https://cdn.sqhk.co/bofogarabu/6oAjaW8/warplanes_online_combat.pdfIn PDF document text
    • https://cdn.sqhk.co/wuseguwe/heiges0/agile_methodology_swot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f945b5b6cd13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_5fa2a8d1dbf59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8b9abe99c7d.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/pgeHgei/10126672500.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/gdjhggq/free_offline_checkers_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fd6778ee3e75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0bedb1-24c2-43b3-bce8-5af28ec400ff/la_mafia_medical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6ed6ef-a018-40bd-910b-ee6d2e6a8965/saab_9-_3_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2171fc5-24af-4234-8473-c4e48a7d4393/45982983087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c075d12a-a14d-472f-a905-df1e64a947e2/jeluralobevigegogalaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239f3aad-a9c5-44bf-a0e7-8b5966eb017b/determinantes_posesivos_ingles_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2deb2289-f88b-431e-92c7-3c937402ab3d/julie_roskies_litman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628641a1-b071-41eb-90f9-1a79e91ce13c/super_smash_bros_play_online_unblocked.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 5452 bytes
SHA-256: 390e6ea47f44b9cef89609ede9148bd4629b4721c3452d7d1a37f921ddd0da0c
font_01_sfnt_off00010ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECC 12532 bytes
SHA-256: f64a4ed73c7102cdf2594af62d128a5886470ece1c37b95b60c7115df914d2dc

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